Preliminary
S3C2451X RISC MICROPROCESSOR
CAMERA INTERFACE
23-13
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
SFR
region
SFR
region
SFR
region
ENVID_MS
SFR
region
Preview DMA frame done
(internal signal)
Capture O
Capture O
Capture X
IRQ
SFR
region
SFR
region
SFR
region
FrameCnt
0
1
1
2
3
3
0
Capture O
Capture O
(Frame_3)
(Frame_0)
(Frame_2)
(Frame_3)
Capture O
(Frame_1)
ImgCptEn_PrSC
Fr+
Figure 23-12. Timing diagram for last IRQ
MSDMA FEATURE
MSDMA supports memory data scaling. Camera interface has two input devices (only preview path). First is
external camera. Second is Memory data. If MSDMA (reading the memory data) want to use in preview path. SFR
SEL_DMA_CAM signal should be set ‘1’. This input path is called Memory Scaling DMA path.
NOTE:
Only two image format support for MSDMA input. (= Saved memory format)
1. YCbCr 4:2:0
2. YCbCr 4:2:2 (Interleave)
Signal Muxing
ITU-R 601/656
4:2:2(interleave)
YCbCr 4:2:0
(non-interleave)
RGB
MSDMA path
Preview path
External
camera
Memory
MSDMA
T_PatternMux
CatchCam
Sc
a
ler
Color
Space
Converter
Figure 23-13. MSDMA or External Camera interface (only CAMIFpreview path)